[DRBD-user] Primary/Primary : how put a node in outdate mode ?

Dominique Fournier dominique.fournier at grenoble.cnrs.fr
Fri Feb 1 17:21:38 CET 2008

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Hello,

As I haven't seen any answer I repost my message. Is it a guy who use 
Primary/primary drbd with fencing ?

Thanks a lot !

Dom

Dominique Fournier wrote:
> Hello,
> 
> I use a drbd 8.2.4-1, on a Debian 2.6.23-1-amd64 machine. The cluster 
> should be in primary/primary mode with OCFS2 to support services on both 
> nodes.
> 
> It work really well under normal work.
> 
> When the drbd link drops, I would like :
> - The first node continue to work as Primary (with Waiting For Connection)
> - The second node go to Outdate mode.
> 
> When the link should goes up, the Secondary do a sync diff and after I 
> can put it primary again, and restart OCFS and my services.
> 
> I wrote a drbd-peer-outdater which know on which node it is launched.
> 
> My problem is :
> How can I put the second node in Outdate state immediately without 
> passing it in Secondary mode ?
> I can't pass it in Secondary because OCFS is mounted and dead services 
> are connected to partition. I can't kill services nor OCFS because drbd 
> is idle.
> 
> Thanks for your time !
> 
> Dom
> 
> My configuration is :
> # /etc/drbd.conf
> common {
>     syncer {
>         rate             100M;
>     }
> }
> 
> resource r0 {
>     protocol               C;
>     on maq1.grenoble.cnrs.fr {
>         device           /dev/drbd0;
>         disk             /dev/sdb1;
>         address          10.0.0.1:7788;
>         meta-disk        internal;
>     }
>     on maq2.grenoble.cnrs.fr {
>         device           /dev/drbd0;
>         disk             /dev/sdb1;
>         address          10.0.0.2:7788;
>         meta-disk        internal;
>     }
>     net {
>         allow-two-primaries;
>         after-sb-0pri    disconnect;
>         after-sb-1pri    disconnect;
>         after-sb-2pri    disconnect;
>     }
>     disk {
>         on-io-error      detach;
>         fencing          resource-only;
>     }
>     syncer {
>         rate             100M;
>         al-extents       257;
>     }
>     startup {
>         degr-wfc-timeout 120;
>     }
>     handlers {
>         outdate-peer     /root/cluster/drbd-peer-outdater.php;
>     }
> }
> 
> 
> 
> 
> ------------------------------------------------------------------------
> 
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